36889987 has 2 divisors, whose sum is σ = 36889988. Its totient is φ = 36889986.

The previous prime is 36889921. The next prime is 36890003. The reversal of 36889987 is 78998863.

It is a strong prime.

It is an emirp because it is prime and its reverse (78998863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36889987 - 2⁷ = 36889859 is a prime.

It is a super-2 number, since 2×36889987² = 2721742281720338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36889087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18444993 + 18444994.

It is an arithmetic number, because the mean of its divisors is an integer number (18444994).

Almost surely, 2^36889987 is an apocalyptic number.

36889987 is a deficient number, since it is larger than the sum of its proper divisors (1).

36889987 is an equidigital number, since it uses as much as digits as its factorization.

36889987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 58.

The square root of 36889987 is about 6073.7127854386. The cubic root of 36889987 is about 332.8915980907.

The spelling of 36889987 in words is "thirty-six million, eight hundred eighty-nine thousand, nine hundred eighty-seven".